package org.bouncycastle.asn1.x509;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DERSequence;

/**
 * The AccessDescription object.
 * 
 * <pre>
 * AccessDescription  ::=  SEQUENCE {
 *       accessMethod          OBJECT IDENTIFIER,
 *       accessLocation        GeneralName  }
 * </pre>
 */
public class AccessDescription extends ASN1Encodable {
    public final static DERObjectIdentifier id_ad_caIssuers = new DERObjectIdentifier("1.3.6.1.5.5.7.48.2");

    public final static DERObjectIdentifier id_ad_ocsp = new DERObjectIdentifier("1.3.6.1.5.5.7.48.1");

    DERObjectIdentifier accessMethod = null;
    GeneralName accessLocation = null;

    public static AccessDescription getInstance(Object obj) {
        if (obj instanceof AccessDescription) {
            return (AccessDescription) obj;
        } else if (obj instanceof ASN1Sequence) {
            return new AccessDescription((ASN1Sequence) obj);
        }

        throw new IllegalArgumentException("unknown object in factory");
    }

    public AccessDescription(ASN1Sequence seq) {
        if (seq.size() != 2) {
            throw new IllegalArgumentException("wrong number of elements in inner sequence");
        }

        accessMethod = DERObjectIdentifier.getInstance(seq.getObjectAt(0));
        accessLocation = GeneralName.getInstance(seq.getObjectAt(1));
    }

    /**
     * create an AccessDescription with the oid and location provided.
     */
    public AccessDescription(DERObjectIdentifier oid, GeneralName location) {
        accessMethod = oid;
        accessLocation = location;
    }

    /**
     * 
     * @return the access method.
     */
    public DERObjectIdentifier getAccessMethod() {
        return accessMethod;
    }

    /**
     * 
     * @return the access location
     */
    public GeneralName getAccessLocation() {
        return accessLocation;
    }

    public DERObject toASN1Object() {
        ASN1EncodableVector accessDescription = new ASN1EncodableVector();

        accessDescription.add(accessMethod);
        accessDescription.add(accessLocation);

        return new DERSequence(accessDescription);
    }

    public String toString() {
        return ("AccessDescription: Oid(" + this.accessMethod.getId() + ")");
    }
}
